[cfe-dev] cling

[Argyrios Kyrtzidis]

Hi Axel,

That is awesome!

On Jul 25, 2011, at 1:33 PM, Axel Naumann wrote:

> 
>> So how well will it scale? For example can we use it to run on/with LLVM/Clang
>> source?
> 
> It scales like a traditional translation unit. I.e. I wouldn't #include
> all of clang's sources but pull clang in through shared libraries and
> headers. As the example I sent shows, cling can load and reference
> shared libs.

Technically it should be possible to have a static library in llvm bitcode and load that, is it something you guys can consider ?

-Argyrios

> 
> Cheers, Axel.
> 
> 
>> 
>> On Jul 25, 2011, at 15:28, Axel Naumann wrote:
>> 
>>> Hi,
>>> 
>>> As we announced before
>>> <http://www.llvm.org/devmtg/2010-11/Naumann-Cling.pdf>, we (people from
>>> CERN and Fermilab) are working on the C++ interpreter(*) cling
>>> <http://cern.ch/cling> that's based on clang and llvm. This is in the
>>> context of ROOT <http://root.cern.ch> and CINT
>>> <http://root.cern.ch/cint>, our current C++ interpreter.
>>> 
>>> We have gotten to a stage where we believe cling is actually useful: it
>>> behaves like a regular interpreter!
>>> 
>>> [cling]$ #include <cmath>
>>> [cling]$ double x = std::sin(3.1)
>>> (double) 4.158066e-02
>>> [cling]$ .L libz
>>> [cling]$ #include "zlib.h"
>>> [cling]$ zlibVersion()
>>> (const char * const) "1.2.3.4"
>>> 
>>> or simply
>>> 
>>> $ echo 'extern "C" const char* zlibVersion();
>>> zlibVersion()' | cling -lz
>>> 
>>> (const char * const) "1.2.3.4"
>>> 
>>> and even
>>> 
>>> $ cat t.cxx
>>> #include "cling/Interpreter/Interpreter.h"
>>> void t() {
>>>  gCling->processLine("gCling->getVersion()");
>>> }
>>> $ cling
>>> [cling]$ .x t.cxx
>>> (const char * const) "$Id: Interpreter.cpp 40322 2011-07-21 14:20:14Z
>>> axel $"
>>> 
>>> We would like to know whether it's just us finding this spectacular :-)
>>> or whether there is general interest. Our aim is to get it included in
>>> the clang repository.
>>> 
>>> For us, this is just the first step; we need to integrate it into the
>>> rest of our software wildlife here at CERN, and we need to continue to
>>> work on robustness and features, e.g. reloading of code. I.e. I expect
>>> we will maintain and continue to develop it for years to come.
>>> 
>>> Here is the code:
>>> svn co http://root.cern.ch/svn/root/branches/dev/cling
>>> 
>>> Let us know what you think!
>>> 
>>> Best regards,
>>> the cling team (Vassil, Philippe, Paul, Lukasz and Axel).
>>> 
>>> (*) Yes, it's not an interpreter, it's really an incremental compiler
>>> with an interactive shell with (eventually) features like automatic
>>> library loading and late variable binding. But it smells like an
>>> interpreter :-)
>>> _______________________________________________
>>> cfe-dev mailing list
>>> cfe-dev at cs.uiuc.edu
>>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>> 
>> 
> 
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